Hi ML, it's only used in one place in the NT that I'm aware of, John 18:1, but in the OT, you will find several "Kidron" references, things like the "brook Kidron" (2 Samuel 15:23) or the "Kidron Valley" (2 Chronicles 29:16).
Of course, in any case, it's using a 6-Letter word in a 5-Letter word game, so I should probably go back and change it That's what I get for trying to play the word games here while trying to do other things at the same time. I am clearly not a multi-tasker